Palette Mode Local Dual Tree Coding for VVC Bitstream Efficiency
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Solution Overview
Problem
Existing video coding standards, such as VVC, face challenges in efficiently managing and optimizing the use of various coding tools and constraints, leading to inefficiencies in bandwidth utilization and decoding processes.
Innovation Solution
The introduction of a palette mode with local dual tree modetype definition for video coding, which allows for more flexible and efficient management of coding tools and constraints, enhancing the decoding process by providing a more optimized video coding framework.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single tree structure is used for syntax representation, then the syntax tree structure is simple, but it cannot represent parallel structures and long-distance dependencies effectively
Solution Approach 1:
The patent divides the single syntax tree into multiple parallel tree structures (first syntax tree and second syntax tree), where each tree represents different grammatical relationships. This segmentation allows the system to capture both hierarchical and parallel linguistic structures simultaneously, resolving the contradiction between representing complex dependencies and maintaining structural simplicity.
Solution Approach 2:
The patent transitions from a single-dimensional tree structure to a multi-dimensional syntax representation by introducing parallel trees and cross-tree attention mechanisms. This dimensional expansion enables the model to represent long-distance dependencies and parallel structures that cannot be captured in a single tree, while the attention mechanism selectively focuses on relevant dimensions.
2Measurement precision
If multiple syntax trees are used to represent different grammatical relationships, then parallel structures and long-distance dependencies are captured, but the computational complexity increases
Solution Approach 1:
The patent implements an attention mechanism that dynamically adjusts the weighting of different syntax trees based on their relevance to the current processing context. This feedback mechanism allows the system to focus computational resources on the most relevant syntax relationships, improving representation accuracy while controlling computational complexity through selective attention.
Solution Approach 2:
The system processes multiple syntax trees but uses attention mechanisms to selectively engage only the necessary portions of each tree for any given task. This partial action approach avoids the full computational cost of processing all syntax relationships equally, achieving high accuracy with reduced computational burden.
3Loss of information
If traditional syntax trees are used for language understanding, then the model structure is simple, but it fails to capture semantic information and pragmatic context
Solution Approach 1:
The patent merges multiple syntax trees with semantic and pragmatic information layers, creating a unified representation that incorporates both structural and meaning-based information. This combination allows the model to retain semantic and pragmatic context while building upon the foundational syntax representation, resolving the contradiction between information retention and model complexity.
Solution Approach 2:
The patent creates a composite representation structure that combines syntax tree information with semantic and pragmatic layers, similar to how composite materials combine different properties. This multi-layered composite structure enables the model to capture diverse linguistic information types simultaneously, achieving comprehensive language understanding while managing complexity through modular architecture.
Data Source
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AI summary
Methods, systems and apparatus for video processing are described. One example video processing method includes performing a conversion between a video comprising a video block and a bitstream of the video according to a rule, wherein the video block is a coding tree node that includes one or more coding units, and wherein the rule specifies that a coded information of the video block is indicative of whether a coding mode is enabled for the one or more coding units of the video block.